Fastener-applying implement



Dec. 31, 1940. A. H. MAYNARD FASTENER-APPLYING IMPLEMENT 2 ShetsSheet 1 Filed Jan. 4, 1939 Dec. 31, 1940.

A. H. MAYNARD FASTENER-APPLYING IMPLEMENT Filed Jan. 4, 1939 2 Sheets-Sheet 2 .0 Z a Z I L1 m M Patented Dec. 31, 1940 PATENT OFFICE 2.227.314 TFASTENER-APPLYING IMPLEMENT Arthur H. Maynard, Warwick, R. I., assignor to Boston Wire Stitcher Company, Warwick, R. L,

a corporation of Maine Application January 4. 1939, Serial No. 249,183

11 Claims.

The present application is a continuation in part of my copending application for Fastenerapplying implements, Serial No. 245,105 filed December 12, 1938.

One of the objects of the present invention is to provide a device of the type indicated having a base and a fastener-applying arm pivotally mounted thereon with the arm and base relatively adjustable to aline the fastener-applying means on the arm with one or the other of separate sets of clinching means on the base whereby to adapt the implement for clinching the fasteners by diiierent methods.

Another object of the invention is to provide a device of the type indicated having a single spring operative to yieldingly hold the fastenerapplying arm raised with respect to the base, the fastener-applying means raised with respect to the arm and the arm biased to retain the pivot-pin carried thereby seated in one or the other oi separate sets of alined notches in stanchions on the base.

Another object of the invention is to provide a device of the type indicated having cooperating means on the fastener-applying arm and base for positively holding the pivot-pin in one or the other of the pairs oi. alined notches in the stanchions on the base during operation of 30 the implement to prevent accidental displacement thereof.

Another object of the invention is to provide a device of the type indicated having means on the base and fastener-applying arm operable as 35 the latter is swung back from the base to cam the pivot-pin carried by the arm downwardly and rearwardly with respect to the base to automatically displace it from one pair of alined notches and seat it in the other pair of alined 50 Fig. 1 is a side view partly in section of a fastener-applying implement incorporating the present invention and showing the device adjusted to clinch the fasteners to form a permanent stitch;

55 Fig. 2 is a view similar to Fig. 1 showing the (Gi l-3) implement adjusted to clinch the fasteners to form a temporary stitch;

Fig. 3 is a fragmentary perspective view of certain parts of the implement shown in disassembled relationship and illustrating the means for pivotally mounting the fastener-applying arm on the base to eifect relative adjustment therebetween;

Fig. 4 is a longitudinal sectional view of the rearward end of the implement showing the cooperating means on the fastener-applying arm and base for positively holding the pivot-pin seated in one of the sets of alined notches in the stanchions on the base;

Fig. 5 is a transverse sectional view taken on 15 line 5-5 of Fig. 4 showing the contiguous rela tionship of the cooperating means on the fastener-applying arm and base for positively holding the pivot-pin seated in the alined notches;

Fig. 6 is a'transverse sectional view on line 6--8 of Fig. 1 illustrating the relationship 01 the parts at the completion oi a fastener-applying operation and showing the legs of a driven fastener clinched to form a permanent stitch;

Fig. '7 is a transverse sectional view on line i--i' of Fig. 2 showing the legs of the fastener clinched to form a temporary stitch;

Fig. 8 is a part-sectional view of the rearward portion of the implement showing the fastenerapplying arm rocked away from the base to adapt the arm to be longitudinally adjusted with respect to the base;

Fig. 9 is a view similar to Fig. 8 showing the meanson the base engaged by the rearward end of the fastener-applying arm to automatically adjust the latter from one to the other of its two positions during extreme swinging movement or the arm away from the base;

Fig. 10 is a view similar to Fig. 9 showingthe relationship of the parts as the fastener-applymg arm approaches alinement with the base during their relative swinging movement;

Fig. 11 is a side view of the implement shown partly in section with the arm and base swung into alinedrelationship to adapt the implement 4 for use as a tacker; and

Fig. 12 is a part sectional view of the rear ward portion of the implement showing the operating lever rocked away from the magazine to open the latter to receive a supply of fasteners andindicating in dotted lines the limit of its movement when the pivot-pin is seated in the forward notches and by dash lines the limit of its movement when the pivot-pin is seated in the rearward notches.

In the accompanying drawings the invention is illustrated as applied to a device for driving and clinching U-shaped staples but-it is to be understood that the implement may be adapted-- for applying other forms of fasteners. As herein illustrated the implement comprises a rectangular base 2 having a raised boss or anvil 3 at its forward end with separate sets of clincher-grooves- 4 and 5 formed therein in spaced apart relationship. The clincher-grooves 4 are adapted to deflect the legs of a staple inwardly toward each other to form a permanent stitch as illustrated in Fig. 6 while the clincher-grooves 5 are adapted to deflect the legs of the staple outwardly ears 1. The forward edge of one ofthestan- 1 chions 6 is provided with a rearwardly-inclined cam-face i5 and-below the cam-face the stanchion is recessed to provide a latching shoulder i9.

In accordancewith the present invention the rearwardly-extending ears 1 on the stanchions 6 of the base 2 are punched or pierced to provide slots 8 for mounting a pivot-pin 9 having an annular recess Ill in its periphery intermediate its ends. As shown most clearly in Figs. 3 and 8, the slots 8 are of arcuate form to provide alined pairs of notches II and I2 at their upper edges in which the pin 9 is adapted to seat, the notches II and [2 being spaced apart a distance equal to the distance between the separate sets of clincher-grooves 4 and 5 on the base 2. Below the rearwardly-extending-ears1 2. lug i1 is folded upwardly from the base 2 between the spaced stanchions 6 and then bent rearwardly to provide a fiat ledge l8 with a, shoulder or abutment 19 at .itsrearward end. The rearward edges of the stanchions 6 below the ears 1 are also formed to serve as abutments or shoulders 20 for a purpose as will be explained later. Preferably. the base 2 is constructed in one piece blanked from sheet-metal stock with the boss 3 struck up therefrom and the clincher-grooves 4 and 5 stamped therein; while the stanchions 6 with the slots 8 pierced therethrough are folded upwardly at the sides of the base.

The fastener-applying arm is similar to that illustrated and described in my copending application, Serial No. 245,105, referred to above, and

, comprises a staple-magazine 26 and an operating lever 21 constituted as a cover in which the magazine is adapted to be nested. The parts 26 and 21 of the arm 25 are both hingedly mounted on the pivot-pin 9 for movement relatively of each other or together as a unit. Suffice it to state herein that the magazine 26 is of channel shape in cross-section having a bottom wall 28 and upwardly-extending side walls 29 adapted to closely fit between-the spaced stanchions 6 on the base 2. The side walls 29 of the magazine 26 are pierced adjacent their rearward ends with alined holes adapted to receive the pivot-pin 9. At the forward end of the magazine 26 the bottom wall 28 is'slitted rearwardly adjacent the opposite side walls 29 and the portion between the slitsis folded upwardly toform'a shear-plate 30; while the projecting ends of the side walls 29 are folded inwardly in spaced relation to the shear-plate 39 to form a throat or guideway- 3| for the staples. Intermediate the ends of the magazine 26 a lug or projection is struck outwardly from one of the side walls 29 to provide a latching shoulder 32.

Extending longitudinally of the channel-shaped magazine 26 is a strut which may take the form of a rod 40 having its forward end bearing against the rearward face of the shear-plate 39 and its opposite end engaging the pivot-pin 9. As illustrated most clearly in Fig. 4, the rearward end of the rod 40 projects through a hole in the upright portion of a right-angular bracket 4| and seats in the annular recess II in the pivotpin 9. The horizontal portion 42 of the bracket 4| underlies the pivot-pin 9 to hold the end of the rod against upward displacement. Thus, the strut or rod 40 serves to brace the shearplate 30 against displacement rearwardly and to retain the pivot-pin 9 in place.

The operating lever or cover 21 is of channelshape arranged in inverted relation to the magazine 26 and having a top wall 43 and depending side walls 44. The lever 21 is slightly wider and longer than the magazine 26 so that the top wall 43 projects beyond the forward end of the magazine and its side walls 44 overlie the sides thereof and the sides of the stanchions 5 on the base 2. The side walls 44 of the lever 21 are pierced adjacent their rearward ends with alined holes adapted to receive the laterally-projecting ends of the pivot-pin 9.

A staple-driver 45 is attached to the top wall 43 of the lever 21 to adapt it to reciprocate in the throat- 3i of the magazine 26 as the lever is rocked toward and away from the latter. As 7 herein illustrated the driver 45 is formed by the forward narrowed portion of a sheet-metal angular plate 46 underlying the bottom side of the top wall 43 of'the lever 21 and fitting closely between the side walls 44 to hold it against twisting movement. The angular plate 46 may be attached to the top wall 43 of the lever 21 by a rivet 41 or any other suitable means such as .ately from its point of attachment to its free end as illustrated in Fig. l. i

A latch 55 is mounted to slide on the side wall 44 of the lever 21 adjacentthat side wall29 of the magazine 26 which is provided with the latching shoulder 32. The latch 55 is in the form of a plate adapted'to bear against the inside face of the side wall 44 and having ears 56 and 51 forming shoulders projecting from its opposite ends for cooperation respectively with the shoulder 32 on the magazine 26 and shoulder I6 on the stanchion 6 of the base 2, as explained more fully in my copending application referred to above. The rearward edge 53 of the latch 55 adjacent the car 51 is inclined upwardly for cooperation with the cam-face I5 on the stanchion 6 of the base .2 to adapt it to automatically slide the latch forwardly during the movement of the lever 21 to close the open side of the magazine 26. The car 56 at the forward end of the latch 55 normally underlies the latching shoulder 32 on the side wall 29 of the magazine 26 as illustrated in Fig. 1, but the latch may be slid rearwardly to release it from the shoulder 32 to engage the rearward car 51 with the latch- "wall and a finger-piece 66 which overlies the wall at the ends of the opening therein. The leyer 21 is yieldingly held in raised position with respect to the base 2 by the engagement of the end of the spring 46 with the top edges of the stanchions '6 and the magazine being connected to the lever 21 by the engagement of the car 66 on the latch 56 with the shoulder '82 on the magazine is also held in raised position by the spring.

Staples 3 are supplied to the channel-shaped magazine '26 through its open top when the lever 21 is swung about the pivot-pin 8 to either position indicated by dotted or dosh lines in Fig. 12. The crowns oi the staples's extend laterally'acrosn the interior or the magazine 26 which is so dimensinned that the opposite legs oi the staple abut the inner faces of its side walls; the staples being supported in the magazine by the engagement of the ends 01 their legs with the bottom wall 26 thereof. The staples are advanced in the magazine by a pusher 65 mounted to slide on the rod or strut 46 and having forwardly-extending rails 66 engageable with the legs of the rearmost staple in the series. The pusher 66 is urged forwardly by means of a compression spring 61 coiled about the rod 46 and acting between the angular bracket ti and the rear of the pusher. The construction of the fastener-applying or stapling arm 26 as thus far described is substantially identical with that illustrated in my prior copending application re ferred to above.

In accordance with the present invention the spring 46 performs an additional function in biasing the arm '25 to maintain the pivot pin ii seated in one or theother of the pairs or alincd notches H and I2 in the stanchions 6 on the base 2. Due to the center of weight of the arm being located forwardly of the point of engagement of the end of the spring 46 with the stanchions 6 the arm tends to rock about the end oi the spring as o pivot to hold the-pivot-pin 6 seated in the ap propriate pair oi notches It or ii. However, to prevent accidental displacement of the pivot-pin d from the alined notches H or E2 in which it is seated during use of the implement, means are provided on the stapling arm 26 for cooperation with the lug l1 on the base 2 to positively hold the pivot-pin seated in the alined notches. As illustrated in Figs. 3 and 4 of the drawings, the bottom wall 28 of the magazine." is cut away at its rearward end to provide an opening 69 and forwardly of the opening the bottom wall is slitted at opposite points and the portion between the slits bent to provide a depending inclined lug 10. The lug 16 is so proportioned that its lowermost edge 1! is positioned directly below the center of the pivot-pin 6 and spaced from the ledge i6 on the lug i1 of the base 2 by only a few thousandths of an inch when the pivot-pin 9 is seated in one or the other of the pairs of alined notches ii and I2. Thus, the edge 1| of the depending lug lid on the stapling arm 26 is adapted to rock in the arc of a circle about the axis of the pivot-pin b and to cooperate with the ledge ill on the lug ll of the base 2 to prevent the pivot-pin from being accidentally displaced from the pair of alined notches H or l2 in which it is seated. The lu 10 on the arm 25 may be displaced from its coop- ..erative relationship with the ledge ii on the base the base from the position shown in Fig. 1 to that shown in Fig. 2, or vice versa, by rocking the arm through an arc of substantially 45 degrees with respect to the base as illustrated in Fig. 8.

Another novel feature of the present invention consists in the construction and arrangement of the lever 21 to adapt it to cooperate with the abutmentsor shoulders I! and 26 on the base 2 to automatically shift the stapling arm 25 from its forward position illustrated in Fig. 2 to its rearward position illustrated in Fig. 1 when the arm is swung through an arc of 180 degrees with respect to the base 2. The rearward portion of the top wall 43 of the lever 21 is so spaced from theaxis of the pivot-pin 9 that when the latter is seated in the rearmost pair of alined notches ii in the stanchions 6 it will clear the shoulder l8 at the end of the lug ll during rocking movement of the arm 25 with respect to the base to the position illustrated in Fig. 11. However, with the pivot-pin 8 seated in the forward pair of alined rearwardly to' displace the pivot-pin from the notches H and move it into the notches l2, see Figs. 9 and 10. Thus, when the base 2 is rocked away from the arm 26 to adapt the implement to be used as a tackenthe pivot-pin 9 will be seated in. the rearward pair of alined notches l2. One preferred form of construction of the invention having been described in detail its mode 01' operation is explained as follows:

Withthe parts of the implement in the relationship illustrated in Fig. l the magazine 26 is opened to adapt it to receive a supply of staples s by first releasing the latch 65. The latch 55 is slid rearwardly to release its ear 56 from engagement with the shoulder 32 on the magazine 26 and the lever 21 is then swung on the pivot-pin 9 to the position indicated in dash lines in Fig. 12. With the pusher retracted a supply of staples s, preferably in the form of a refill stick is inserted in the magazine 26 between the spaced side walls with the ends of their legs resting against the bottom wall 28. After the magazine 26 has been loaded with a supply of staples s the lever 21 is swung back toward the magazine in the manner indicated by the dotted lines and full lines in Fig. 12. During this movement of the lever 21 the free end of the spring 48 engages the upper edges of the stanchions 6 on the base 2 and the inclined edge 66 of the latch 65 engages the inclined camface ii on the forward edge of one of the stanchions. Further continued movement of the lever 2i toward the base 2 causes the spring 48 to be tensioned and the latch, 65 to be slid forwardly by the cam-face l5 until its car 56' underlies the latching shoulder M on the side 29 of the magazine 26.

During this last-explained swinging movement of the lever 2'5 with respect to the magazine 26 the driver 45 enters the throat 31. When manual pressure on the lever 21 is released the tensioned spring 48, acting against the stanohions 6, causes the lever to move upwardly away from the magazine 26 and base 2 until the ear 56 on the latch 55 engages the latching shoulder 32 on the side of the magazine 26. Thereafter, the magazine 26 will swing upwardly with the lever 21 until the end of the spring 48 is engaged with the top edges of the side walls 29 of the magazine as shown in Fig. 1. Due to the location of the center of weight of the stapling arm 26 forwardly of the point of engagement of the spring 46 with the stanchions 6 on the base 2 the arm tends to rock about the end of the spring as a pivot to maintain the pivotpin 6 seated in the rearward alined notches l2. To guard against accidental displacement of the pivot-pin 9, however, it is held positively :in the alined notches l2 by the cooperation of the depending lug ill on the magazine 26 with the ledge IS on the lug ".0! the base 2. If by any chance therearward end of the stapling arm 25 should be depressed downwardly the lowermost edge ll of the lug 10 will engage the ledge II of the lug IT to prevent the pivot-pin 8 from being displaced from the notches l2. Due to the clearance between the. lowermost edge ll of the lug ll and the ledge I 6 of the lug I! the stapling arm may freely rock on the pivot-pin 6 toward and away from the base'2.

The implement may be operated to drive a staple by applying pressure to the forward end of the lever 21 to cause the stapling arm 25 to move to ward the base 2 until its forward end is in engagement with the work 10 placed' on the anvil 3. Continued pressure on the lever 21 causes the driver 45 to move through the throat 3| to drive a staple therefrom. The pivot-pin 9 being seated in the rearward pair of alined notches l2 positions the driver 45 in alinement with the rearward set of clinching grooves 4 and consequently the legs of the staple will be clinched to form a permanent stitch as illustrated in Fig. 6. When the lever 21 is released the spring 48, acting between the stanchions 6 and the lever, causes the magazine 26 and the lever to be raised to the position illustrated in Fig. 1 in the manner as explained :above. When a temporary pin-stitch is desired thestapling arm 25 is rocked rearwardly through an arc of substantially 45 degrees with respect to the base 2 to the position illustrated in Fig. 8. The depending lug 10 at the rearward end of the magazine 26 will be then displaced above the ledge l8 of the lug I 1 on the base 2 to permit the pivot-pin 9 to be disengaged from the alined notches l2 and slid forwardly in the slots 8 to seat it in the notches ll. When the stapling arm 25 is swung downwardly toward the base 2 to the position illustrated in Fig. 2 the depending lug 10 again moves into cooperative relationship with the ledge i8 to prevent the pivot-pin 8 from being accldentally displaced from the alined notches l I. In this last-explained adjustment the driver 45 on the stapling arm 25 is in alinement with the forward set of clinching grooves 5 on the. base 2 which are adapted to clinch the legs of the staples to form a temporary stitch as illustrated in Fig. 7. The implement is operated with the stapling arm 25 in this adjusted position in the me manner as explained above by depressing the forward end of the lever 21 to cause the staple-driver to move through the throat 3|.

With the stapling arm 25 in either one or the other of its two positions of adjustment the lever notches I2 the rearward end of the top wall 43 of the lever 21 will clear the shoulder I! at the end of the lug l1 and engage the shoulders 20 at the'rear of the stanchion 6 on the base 2 which act as a stop when the base is swung into alined relation to the arm 26, see Fig. 11. However, when the pivot-pin 6 is seated in the alined notches Ii the rearward portion of the top wall 43 of the lever 21 engages the shoulder is at the end of the lug II, as illustrated in dotted lines in Fig. 12. To move the lever 21 to the position illustrated in dash lines in Fig. 12 the magazine 26 is rocked to swing the lug I ll away from the ledge l6 on the base 2. The engagement of the rearward portion of the top .wall 43 with the end of the lug I! then earns the stapling arm 25 downwardly and rearwardly to displace the pivot-pin "6 from the notches H. Upon continued swinging movement of the lever 21 with respect to the base 2 the rearward edge of the top wall 43 engages the shoulders 20 at the rearward edges of the stanchions 6, see Fig. 10, and cams the pivot-pin 6 rearwardly and upwardly into engagement with the alined notches I2, see Fig. 12. Thus the stapling arm 25 is automatically shifted with respect to the base from its for ward position of adjustment to its rearward position. of adjustment when the lever is swung through an arc of degrees with respect to the base and the magazine 26 tilted in the manner explained above. The lever 21 is then in position to engage the inclined cam-face 58 at the rear of the latch 55 with the inclined camface l5 on the base 2 when the lever is swung back to overlie the magazine.

It will be observed from the foregoing that the present invention provides an implement in which the stapling arm and the base are relatively adjustable to aline the staple-applying means on the arm with different forms of clinching means on the base. It will also be observed that the present invention provides means for holding the stapling arm against accidental dis placement from its adjusted position on the base. Still further, it will be observed that the present invention, provides for automatically shifting the stapling arm from its forward position to its rearward position of adjustment by rocking the magazine with respect to the base to move its lug away from the ledge and swinging the fastener-applying lever through an arc of 180 degrees into rearward alinement with the base.

While I have shown and described herein a preferred form of construction of the implement, by way of example, it is to be understood that modifications may be made in the structure and arrangement of the parts thereof without departing from spirit or scope of the invention. Therefore, without limiting myself in this respect, I claim: 7

1. Ina device of the type indicated, a base having separate sets of clinching means and a slot with notches therein spaced apart longitudinally thereof, a magazine for fasteners, fastener-applying means movable relatively of the magazine to drive fasteners therefrom, a pivotpin on the magazine extending through the slot in the base and adapted to seat in the notches. to allne the driven fasteners with one or the other of the different sets of clinching means, and a single resilient element for yieldingly holding the magazine raised with respect to the base and biased to retain it in oneor the other of its two positions, said element also acting to hold the fastener-applying means raised with respect to the magazine.

2. In a device of the type indicated, a base having spaced sets of clinching means, a magaotherto aline the driven fasteners with one or the other of the separate sets of clinching means, fastener-applying means movable relatively of the magazine to drive the fasteners therefrom, and a single resilient element for yieldingly holding the magazine raised with respect to the base and biased to retain it in one or the other of its two positions, said element also acting to hold the fastener-applying means raised with respect to the magazine.

3. In a device of the type indicated, a base having spaced sets of clinching means at one end and spaced stanchions adjacent its opposite end, said stanchions having longitudinally-extending slots with-pairs of alined notches spaced along their edges, a magazine for fasteners having a throat at one end through which the fasteners are driven and a pivot-pin adjacent its opposite end projecting through the slots in the stanchions, said pivot-pin being adapted to seat in one or the other pair of notches to aline the throat with one or the other set of clinching means, fastener-applying means movable relatively of the magazine to drive fasteners therefrom, and a single resilient element for yieldingly holding the magazine raised with respect to the base and biasedto retain the pivot-pin seated in one pair of notches, said element also acting to maintain the fastener-applying means raised with respect to the magazine.

4. In a device of the type indicated, a base having separate sets of clinching means and a slot with notches therein spaced apart longitudinally thereof, fastener-applying means, a pivot-pin on the fastener-applying means ex- 40 tending through the slot in the base and adapted to seat in the notches to aline the driven fasteners with one or the other of the diflferent sets of clinching means, and rigid means on the fastener-applying means and adapted to oo- 15 operate with the base for positively holding the pivot-pin in one or the other of the notches to prevent accidental displacement of the fastenerapplying means.

5. In a device of the type indicated, a base having separate sets of clinching means and slots with pairs of alined notches spaced apart longitudinally thereof, a fastener-applying arm, a pivot-pin on the arm projecting through the slots in the base and adapted to seat in the alined notches to aline the driven fasteners with one or the other of the different sets of clinching means, and a rigid lug depending from the arm below the pivot-pin and adapted to cooperate with the base for positively holding the pivot-pin in one or the no other of the pairs of alined notches to prevent accidental displacement of the arm.

6. In a device of the type indicated, a base having separate sets of clinching means and 65 spaced stanchions projecting upwardly therefrom, said stanchions having slots therein with pairs of alined notches spaced apart longitudinally thereof, a fastener-applying arm, a pivot-pin on the arm projecting through the slots in the stanchions and adapted to seat in the paired notches to aline the fastener-applying arm with one or the other of the separate sets of clinching means, and a rigid lug depending from said arm below the pivot-pin and adapted to cooperate with the base to hold the pivot-pin in one or the other of the pairs of alined notches, said pivot-pin being releasable to permit it to be slid from one to the other of the pairs of alined notches by rocking the arm away from the base. i

7. In a device of the type indicated, a base having separate sets of clinching means and spaced. stanchions projecting upwardly there- ,from with a ledge between the stanchions, said stanchions having slots therein above the ledge with pairs of alined notches spaced apart longitudinally thereof, a fastener-applying, arm, a

pivot-pin on the arm projecting through the slots in the stanchions and adapted to seat in the paired notches to aline the fastener-applying arm with one or the other of the separate sets of clinching means, and means on said arm cooperating with the ledge on the base to positively hold the pivot-pin in one or the other of the pairs of alined notches, said pivot-pin being releasable toadapt it to be slid in the slots from one to the other of the pairs of notches by rocking the arm away from the base.

8. In a device of the type indicated, a base having separate sets of clinching means and slots with pairs of alined notches spaced apart longitudinally thereof, a fastener-applying arm, a pivot-pin on the arm projecting through the slots and adapted to seat in the paired notches to aline the fastener-applying arm with one or the other of the separate sets of clinching means on the base, and means on said base engageable with the fastener-applying arm as the latter is swung away from the base to shift the pivot-pin in the slots to engage it with one or the other of the pairs of alined notches.

9. In a device of the type indicated, a base having separate sets of clinching means and slots with pairs of alined notches spaced apart longitudinally thereof, a fastener-applying arm, a pivot-pin on the arm projecting through the slots and adapted to seat in the alined notches to aline the fastener-applying arm with one or the other of separate sets of clinching means on the base, and stepped shoulders on the base below the slots engageable with the rearward end of the fastener-applying arm as the latter is swung away from the base to shift the pivot-pin in the slots from the forward to the rearward set of alined notches.

10. In a device of the type indicated, a base having separate sets of climbing means and spaced stanchions projecting upwardly therefrom, said stanchions having slots therein with pairs of alined notches spaced apart longitudinally thereof, a fastener-applying arm, a pivotpin on the arm projecting through the slots in the stanchions and adapted to seat in the paired notches to aline the fastener-applying arm with one or the other of the different sets of clinching means, and a lug projecting upwardly and rearwardly from said base and cooperating with the stanchions to provide stepped shoulders, said stepped shoulders on said base being engageable by the rearward end of said fastener-applying arm as the latter is rocked away from the base to cam the pivot-pin downwardly and longitudinally of the slots to shift it from one to another of the pairs of alined notches.

11. In a device of the type indicated, a base having separate sets of clinching means and stanchions projecting upwardly therefrom, said stanchions having slots therein with pairs of alined notches spaced apart longitudinally thereof, a hollow magazine having an open side through which the fasteners are supplied, a lever for closing the open side of the magazine and having means for driving fasteners from the latter, a pivot-pin connecting the magazine and lever and projecting through the slots in the stanchions, said pivot-pin being adapted to seat in the paired notches to aline the driven fasteners with one or the other of the separate sets oi clinching means, and means on the base engageable by the end 01 the lever as the latter is swung with respectto the base, said means on the base being operative to move the pivot-pin downwardly and longitudinally of the slots in the stanchions to shift it from one to another of the pairs 5 of alined notches. v

ARTHUR HJMAYNARD. 

